Just curious, do you have an official purchase record of serial numbers rather than written down ones?Trying to match SN's from items you see online isn't proof of ownership because obviously you can claim those serial numbers are yours if you can read them online.. Just thinking out loud here

Try this link http://www.stolencamerafinder.com/ it scans the web, mostly social media etc, for any images carrying your camera's unique identifiers. Some total shit stole all my gear in 2008. Unfortunately I didn't recover any of it but you may get better results by subscribing to it and posting details. You don't need all the serials just drag/drop an image into the box.......Good luck.